I HAVE AN A FRAME CABIN THAT HAD A LEAKY ROOF. THE ROOF HAS BEEN REPLACED BUT THE TONGUE AND GROOVE CEDAR CEILING/WALLS HAVE WATER STREAKING STAINS. I AM LOOKING FOR THE BEST (EASIEST) WAY TO REMOVE THE WATER STAINS AND ALSO TREAT THE WOOD. THE PEAK IS ABOUT 30 FOOT UP SO SOMETHING THAT CAN BE APPLIED WITH AN EXTENDED ROD WOULD BE GREAT.